Well I have purchased the fabco NV-55-18 and I was not impressed. I do run a longer run of CO2 tubing which means i have to walk away for 5 minutes after each adjust. It was better than the otpion I had before hand but still does not allow anything but very fine twists of the knob to make big differences.
MY output PSI is set to 25 PSI... No matter what I've tried the fabco valves are still extremely finicky. I onlly paid $40 a piece so they represented a cheaper option.
I am now waiting on a pair of Dakota https://www.dakotainstruments.com/ba...-straight-flow
model # 6AMV1101 Maximum Flow Rate: Air - 200 mL/min, Water - 6 mL/min, 0.042 Orifice, 0.0008 Cv
hoping this allows for a much more finer / coarser control of the bubbles